123523920 has 320 divisors, whose sum is σ = 472469760. Its totient is φ = 29472768.

The previous prime is 123523919. The next prime is 123523927. The reversal of 123523920 is 29325321.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123523927) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1488199 + ... + 1488281.

It is an arithmetic number, because the mean of its divisors is an integer number (1476468).

Almost surely, 2^123523920 is an apocalyptic number.

123523920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123523920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236234880).

123523920 is an abundant number, since it is smaller than the sum of its proper divisors (348945840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123523920 is a wasteful number, since it uses less digits than its factorization.

123523920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 123523920 is about 11114.1315450196. The cubic root of 123523920 is about 498.0240952197.

The spelling of 123523920 in words is "one hundred twenty-three million, five hundred twenty-three thousand, nine hundred twenty".